The term 'They Raise the Roof' is a phrase that is used to describe a group of people who are having a great time and celebrating. The crossword solution for this phrase is 'RAFTERS', which refers to the wooden beams that support the roof of a building. RAFTERS are an essential part of any structure, as they provide the necessary support for the roof. Without them, the roof would collapse. Therefore, the phrase 'They Raise the Roof' is a metaphor for a group of people who are having a great time and celebrating.